What is IAsyncEnumerable used for?
PICTURE THIS: A SENTENCE BECOMES TOKENS
The model does not read letters like humans. It reads these pieces, then predicts the next one.
Simple meaning
It streams async sequences with await foreach.
WHY — C# instead of guessing?
Why interviewers care about C#:
who only read docs from people who shipped.
and tied to .NET work.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens with tokens?
Before the model can read a sentence, it goes through these steps:
- 1It streams async sequences
with await foreach.
- 2Useful for large result
sets without buffering everything.
- 3Embeddings
Cancellation tokens still matter.
- 4Context mix
Attention looks at nearby tokens together.
- 5Next token
The model scores what should come next.
- 6Decode
IDs turn back into readable text.
EXAMPLE — See it in action
Let's see how a real sentence is tokenized (tokens may vary by model):
Note: Actual tokens and IDs depend on the tokenizer (e.g., GPT, Llama, etc.).
Key takeaway
It streams async sequences with await foreach. Useful for large result sets without buffering everything.